During my winter snowboard training I suffered from Achilles tendinitis (most likely bursitis) and had to stop any activities for about 2-3 weeks, while wearing a splint constantly, as my sports doctor instructed me. He didn't give me any steroid injections, or NSAIDs or any medication whatsoever.
After that I started doing eccentric heel exercises(since everyone is discussing their effectiveness) for about a month (6 sets of 15 reps twice a day). After seeing some results I quickly reached a plateau and the painful lump at the back of my heel wouldn't disappear. Because of frustration and a busy schedule I discontinued the exercises.
As a result, after 5 months I still have a lump (inflammation?) at the back of my foot, there is some mild discomfort when walking after wake up and there is moderate pain if I start running or even make sudden moves(!!) without warming up. It has also become apparent that I cannot engage in any kind of sports activity (although being only 24 years old!).
Can anyone provide some help as to what I should do to get rid of this problem. For example, should I start the exercises again and be more persistent, or should I try a different approach? Surgery is not an option because I am aware of the complications and the, usually, poor results. I would greatly appreciate any kind of help/advice. Thank you in advance.